کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1277170 | 1497568 | 2012 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Tomographic analysis of porosity variation in gas diffusion layer under freeze-thaw cycles Tomographic analysis of porosity variation in gas diffusion layer under freeze-thaw cycles](/preview/png/1277170.png)
Synchrotron X-ray micro-computed tomography (X-ray μCT) is employed to measure the volume variation of gas diffusion layer (GDL) of a polymer electrolyte fuel cell (PEFC). In the present study, 3D structures are reconstructed by merging orthogonal-plane images. Using the 3D reconstruction, the variation of structural parameters such as the porosity in GDL is investigated under freeze-thaw cycles. The freez-thaw cycles are established using cryo system and light source, respectively. As a result, a structural transformation is observed at the interface between GDL and micro porous layer (MPL). In addition, the porosity is critically changed with irreversible transition under freeze-thaw cycles.
► Porous GDLs under freeze-thaw cycles are quantitatively visualized using synchrotron X-ray micro-computed tomography.
► Cyclic variation of porosity was observed in freeze-thaw cycles.
► Crack region which can cause flooding was observed.
Journal: International Journal of Hydrogen Energy - Volume 37, Issue 1, January 2012, Pages 566–574